Callen, famous for his “MADtv” stint, his podcast adventures with Joe Rogan and appearances in movies such as “The Hangover Part II,” has hit on stand-up comedy paydirt with his “Man Class” act.

He arrives at Laugh Out Loud Comedy Club on Friday for the three-night, five-show stand. It's a guarantee fans will call out for riffs about frolicking and the butter police.

“I'm basically working on a whole new ('Man Class') hour,” Callen said.

“I'm really excited. Now, when I do these shows, I get these requests for the stuff, like, 'Do the butter bath.' That's kind of cool because you know you're starting to get a following when people know your own stuff. It's so awesome.”

Stand-up is a constant process of reinvention, he explained. Callen says there's a responsibility that comes with good comedy.

“Some fans want to see the same stuff, but most people want to laugh at something they haven't seen before. Comedy is surprise. Comedy is not something that you can, necessarily, do twice,” Callen said.

“That's what makes stand-up so different than, say, being a music guy, like a rock star. If you're the Rolling Stones, you can sing 'Start Me Up' for 35 years and people still cheer. If you show up doing the same jokes, people stop coming to your shows. You got to bring the heat.”